Lens machinery



u. w. HILL. LENS MACHINERY.

APPLICATION FILED OCT 14. I919- Patented Apr. 18, 1922.

3 $HEETSSHEET INVENTOR. HARRY W HILL H. w. HILL.

LENS MACHINERY.

APPLICATION FILED OCT 14, I919- Patented A r; 118, 1922.

3 SHEETSSHEET.2.

INVE NTOR. HARRY W HILL V W WW H; w. HILL.

LEN-S MACHINERY. APPLICATION FILED QCT 14, L919,

3 SHEETS-SHEET 3.

INVENTOR. HARRY VV I'ZZLL ATTORNEYS.

, parts in section An adjusting screw carried. w

edto vary the in and out ad- JillC on the line HI+TH v journaled HARRY w. HILL, or sonnmen, raessao orrrean ocean, or son'rnrnen, MASSACHUSETTS, A

CIATION 0F ACHUSETTS.

ems, nssrenon ro AMERICAN VOLUNTARY ASSU- LENS MACHINERY.

Specification of Letters Patent.

Patented Apr. 118, 1922.

Application filed October M, 1919. Serial No. 330,562.

.7 '0 all whom it may concern 1 Be it known that I, HARRY. W. HILL, of Southbridge, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Lens Machinery, of which the. following is a specification.

This invention relates to improvements in lens machinery and has particular reference to novel and improved mechanism particularly adapted forthe production of ophthallenses. 3

Line of the leading objects of the present invention isthe provision of an improved machine which will facilitate the rapid production of opthalmic lenses and which is particularly adapted to increasethe speed of production of lenses of the bifocal type.-

A further object of the present invention is the provision of a novel machineof this character'which shall be apable of adjustment for various sizes and types of work;

. Other objects and advantages of my improved construction should be readily apparent by reference to the following specification taken in connection with the accompanying drawings, and it will be understood that Imay make; any modifications in the specific details of construction shown and described within the scope of the appended claims without departing from or exceeding the spirit of my invention,

Figure I represents a side elevation with of one embodiment of my improved machanis Y 1 Figure II represents a front'view thereof. Figure HI represents a: sectional view as of Figure T. Figure IV represents a fragmenta seetiojpal view as on the'line 'IVEIV of igure H f w p Tn thevdrawings, the numeral 1 designates the main frame of my machine provided with the upper slideblock '2 in which is the spindle 3 which may be either rotatably' block 2, as preferred, but in either event is vertically slidable and preferably provided with the weighted portion or pully '4 impelling the spindle downwardly, and if desired in' addition serving to receive driving power. by the frame 1 maybe emplo justment'of t e spindle? Opposed to the the 'which "in Figure .TV

and secured in adjusted "ventio-n as employed in facelens, or if desired which is to be case may be, on the lens.

or non-rotatably mounted in the spindle 3 is a second spindle 6 journaled in and provided with the drive rotat on. This spindle is upper'end with the-tapere portion 10 extending into the socket ,ll of a tool or lens holder 12, 1n the drawings this being illustrated as a block bearing the lens blank'13, 1s operated on by the series of tools heseftools 14 as illustrated in detail are provided with the cone sockets 15 adapted to receive the points of the pins 16, permitting of the free oscillation and rotation pully 9 for its dprovided at its arms 18', being adjusted as by a screw 19 position by the lock nuts 20. The tripod itself is mounted on the lower end of the spindle 3 and preferably secured in position as by the use of the set screw'21. i I

It will be noted that I have shown my inthe grinding or pollshl-ng of the major portion of a bifocal lens, the tools being of size to extend from the edge of the reading portion to that of the distance portion in the case of a merged surbeing slightly oversized to overlap both of said edges as shown 1n Figure HI, when a countersunk bifocal is .being ground or'polished. The inner surv faces of the tools in :question may be of any desired form, either solid or ring tools or the like as preferred, in the present instance the tools 14 being shown as of solid construction having on their faces the curve produced or followed, as the It will'be understood that while I have slide 7 ingu'lde-ways 8 on the frame 1.

of, the I tools 14. These pinsextend through slots 17 in the tripod,

shown the present construction as particuuse in connection with bi- ;larly adapted for I my machine is not limited focal lenses that to this use but is universal in application and may "be so adjusted as to produce ordinary spherical lenses or other similar surfaces if preferred.

In operation of-my machine in the form v illustrated in Figures ][.and H, l have shown the opposed spindles or members3 and 6 as disposed in alinement one with the other, in wh ch event either bers;3 and Ginay .be driven as preferred, the essential beingthat a relative rotation between the parts is attained. When used as one or both of the mem-.

here illustrated for the respect to the edge 22 of the or blend the two and tools will frictionally rotate the tools 14 about the points of the pins 16 providing the necessary cross motion to prevent scratching or improper polishing of the lens being produced. To facilitate the correct positioning of the pins 1' have as beforementioned, rendered them adjustable and accurately positionable through the use of the set screws-19.

In some cases, havebut one of tending .ex'actly. up ing portion others operating slightly away from this line, this being particularly desirable in the event that it is desired semi-grind or polish the lens at this point however, I may prefer to he three tools employed exfeature desired by some members of the optical trade'atthe present time.-

When it is desired to accomplish this result I may: either holder and may i'm'part'slight horiz onta justment to oneor'the other-of the slides 2 is driven, adjus'tmntniay be made of one or the other or both spindles to properly positionthe center point between, the several .center of the; several pins,

have all-of the pins-16 adjusted at equal dis-. tances from' the center. of their tripod or or 7 through 5 or 23, or slightly inward the use of the:adjustingiscrews w th respect to the'common as preferred.

Similarly, and particularly if but one spindle tools in place of it'being necessary to loosen the lock nuts and individually adjust the pin 16 to attain this result.

The in and out and lateral relative ad justments of the. two spindles are also 'partioularly advantageous when it is desired to so adju'stthe mech 'nismthat the several tools together will pass over the entire surface of the lens to produce a continuous surface in place'of a bifocal surface) Z An additional advantage also accomplish-- able with my improvedmachine by-proper adjustment is of the lens may upon by 'm machine by; proper selection of size of too s and parts so form of carrier and its j pm'lti overhe the i from the spindle 3 so in the form of to the edge oi the readof the bifocal-segment and the to somewhat blur overhor' ience of identification I have fields one into the other, a f

qited to' ,a three farms or other number may preferred without in anywise' departing I may adjust one of the pms h angularly related at-an angle to that ojffithe; movement.

that if? desired both surfaces] besimultaneously operated,

relative adj ustment" off the that-one arm of the tripod or other iaiaee'z central or reading portion of the lens blank, while the other arms operate upon the distance' portion, thefwhole' lens thus being ground or polished in a single operation. It is to be noted that I have shown the'connection between the spindle 3 and thetripod a ball 224v having the laterally projecting arm 25 interlocking with the central portion or ball socket of the tripod. The purpose of this is to allow of'rocking movement of the tripod on the bottom of the spindle and at the same time the arm 25 interlocking with the socket serves to drive the tripod with the spindle 3 against rotation in those instances where the spindle is not rotated. The thumb screw 21 may'be'caused to bind against the ball just sufficient to prevent slipping of the .tripod off the spindle when raised or clamped thereagainst to supplement the flCtlOIl of the or to hold it v arm .25 in holding the parts against rela In this connection I wish to the fact thatfor convenemploye terin tripod in referring to the holder formed by the arms 18, but l do not intend to be limar'in construction as four be made use of if 'tive' movement. to "call attention from my invention.-

.lclaimt -f; I" 4 1'. A1 lens machine'inclu'ding a frame, a pair of. spindle members mounted in the dthe frame nfor horizontal adjustment in two directions, a lens holder carried by. one of the spindles, a plurality of radiating arms carried by the other of the spindles bearing pins on the arms, and lens grindingtools mounted on the pins.

2., A lens grinding machine including o posed spindles respectively adapted to hol the lens and tools for operating upon the lens,

a lens operating tool holder including diver- I ustable longitudinally of the arms, lens surfacing tools means for rela-' tivel'y horizontally shifting the axesot the gent arms,fcone bearing points ad carried by said bearings,

opposed spindles, andadditionalmeans for shifting said axes in ahorizontal. direction ',-In'testimony whereof I 'ha ve my signature, in presence' of two witnesses.

nanny wnmn. Witnesseszn H, E. 001 m,.

first" mentioned 7 

